Tuesday
March 3, 2015

Posts by SARA


Total # Posts: 3,879

Trig
Find sin2theta, cos2theta if csctheta=13/12 and lies in quadrant II. Thank you!
June 13, 2012

chemistry
A 375 g sample of well water is found to contain 17.0 mg of lead. How much lead (in parts per million) is in the well water? Round to the nearest tenth. Don't forget the unit.
June 12, 2012

finance
The Nutrex Corporation wants to calculate its weighted average cost of capital. Its target capital structure weights are 40 percent long-term debt and 60 percent common equity. The before tax cost of debt is estimated to be 10 percent and the company is in the 40 percent tax ...
June 10, 2012

finance
Faulkner's Fine Fries, Inc. (FFF), is thinking about reducing its debt burden. Given the following capital structure information and an expected EBIT of $50 million (plus or minus 10 percent) next year, should FFF change their capital structure? Current Porfolio Total ...
June 10, 2012

finance
P5 For the following projects, compute NPV, IRR, MIRR, profitability index, and payback. If these projects are mutually exclusive, which one(s) should be done? If they are independent, which one(s) should be undertaken? Year 0 -1,000 -1,500 -500 -2,000 Year 1 400 500 100 600 ...
June 10, 2012

finace
Find the IRR and MIRR of a project if it has estimated cash flows of $5,500 annually for seven years if its year-zero investment is $25,000 and the firm's minimum required rate of return on the project is 10 percent.
June 10, 2012

maths
a cyclist and jogger are 20 miles apart. the cyclist rides at 17 mph and the jogger runs at 7 mph. they move towards each other. a fly starts on the nose of the cyclist and flies at 20 mph from the cyclist to the runner and back. it continues back and forth until the cyclist ...
June 9, 2012

rate of change
For a person at rest, the function p(t) = -20 cos(300˚t) + 100 models blood pressure, in millimeters of mercury ( mm Hg), at time t seconds. What is the rate of change in blood pressure at 3 s?
June 9, 2012

biology
why does The sodium-potassium pump move potassium ions into and sodium ions out of a cell down a protein canal?
June 6, 2012

math
Susan's back yard is rectangular with dimensions 39 yd. by 71 yd. Carlos's back yard is rectangular with dimensions 30 yd. by 50 yd. How much larger is the area of Susan's back yard than the area of Clarlos's back yard?
June 4, 2012

algebra 2
pleas help me with my home work 00703600
June 4, 2012

Physics
A plane leaves Seattle, flies 84.0 at 21.0 north of east, and then changes direction to 53.0 south of east. After flying at 125 in this new direction, the pilot must make an emergency landing on a field. The Seattle airport facility dispatches a rescue crew .How far should the...
June 3, 2012

accounting
. Making Product X requires 4,000 hours of labor and Product Y requires 6,000 hours of labor. TUV undertakes an automation program that reduces the consumption of labor required by Product Y to only 2,000 hours of labor. Product X is not affected by the automation process. ...
May 31, 2012

Physics
Multiple Concept Example 9 provides background pertinent to this problem. The magnitudes of the four displacement vectors shown in the drawing are A = 16.0 m, B = 12.0 m, C = 13.0 m, and D = 23.0 m. Determine the (a) magnitude and (b) direction for the resultant that occurs ...
May 29, 2012

chemistry
how many moles of ammonium sulfate can be made from the rxn of 30.0 mol of NH3 with H2SO4 according to the following equation: 2NH3 +H2SO4-->(NH4)2SO4
May 28, 2012

Factor Theorem(Math)
Why is x-1 not a factor of f(x)= 4x^3+8x^2+x-3?
May 27, 2012

Math
A 3m tall post casts a shadow 2m long . If a tree casts a shadow 9m long at the same time how tall is the tree ?
May 22, 2012

pre calc
log(x^2+2x-3/x^2-4)-log(x^2+7x+6/x+2)
May 22, 2012

Chemistry help please?
order these highest PH to the lowest PH Ca(OH)2(aq) HCN(aq) NH3(aq) LIOH(aq) HCI(aq)
May 20, 2012

Math Help!!
Solve 2x-y-5z=1 x+2y+3z=9 3x+6y+z=11 2x-3y=-13 -5x+2y=16
May 17, 2012

Math
1) Matt traveled the first leg of his trip for 1350 miles on a large jet. He then traveled an additional 600 miles on a private plane to reach his destination. If the speed of the jet was three times the speed of the plane and the total time in the air was 6 hours determine ...
May 17, 2012

Math
The average of to consecutive Even integers is 17. Find the largest of the four integers ?
May 16, 2012

Math
Um... 365+365?!
May 15, 2012

physics
How did you get F12 and F13 ??
May 15, 2012

Math
Johnsons accumulated a nest egg of $40,000 to use as down payment toward a new home. Present gross income has them in high tax bracket, decided to invest min $2400/month in payments (for tax break). Financial obligations cannot exceed $3000/month. If local mortgage rates were ...
May 15, 2012

Math
Johnsons accumulated a nest egg of $40,000 to use as down payment toward a new home. Present gross income has them in high tax bracket, decided to invest min $2400/month in payments (for tax break). Financial obligations cannot exceed $3000/month. If local mortgage rates were ...
May 15, 2012

Math
Sarah secured a bank loan of $200,000 for the purchase of a house. The mortgage is to be amortized through monthly payments for a term of 15 yr, with interest rate of 6%/year compounded monthly on the unpaid balance. She plans to sell her house in 5 yr. How much will Sarah ...
May 15, 2012

math
a small plane sitting on a runway 5 miles west and 2 miles north of town is scheduled to fly to a second runway 17 miles east and 25 miles north of the same town. to the nearest mile, what is the distance between the two runways
May 14, 2012

solid geometry...
find the area of the earth's surface within the Arctic Circle; that is, in latitude north 66° 32' N. thank you! :D
May 12, 2012

solid mensuration? help.
Window glass formerly was made by gathering a lump of molten glass on the end of a hollow rod blowing it into the form of a large hollow cylinder about 6 ft. long and 1 1/2 ft. in diameter. This was cut longitudinally and then placed in an oven and heated until it softened, ...
May 12, 2012

solid mensuration
the area of the total surface of a polyhedron weighing 64 lb. is 340 sq. in. what is the surface of a similar polyhedron made of the same material and weighing 1000 lb. ? thank you!!
May 12, 2012

math
the area of the total surface of a polyhedron weighing 64 lb. is 340 sq. in. What is the surface of a similar polyhedron made of the same material and weighing 1000lb. ?
May 7, 2012

math (solid mensuration)
A light is placed 5 ft. from the center of a globe 3 ft. in diameter. Find the area of the illuminated portion. thank you!
May 7, 2012

physics
1.41 m/s
May 7, 2012

Spanish-Thank you
Thank you all
May 5, 2012

Spanish-Please check
Thank you I would appreciate that Ms. Sue
May 5, 2012

Spanish-Please check
¿Te gustaría quedarte en una pensión o en un hotel? ¿Porque? Me gustaría quedarme en una pensión porque una pensión es menos cara que un hotel.
May 5, 2012

physics
(a) calculate the number of kilocalories needed to climb 232 stair steps (116 steps per minute for 2 min.) *climbing stairs (116/min.) = energy consumption rate is 9.8 (kcal/min) * (b) calculate the gain in gravitational potential energy for a 50-kg person if each step 0.18m ...
May 4, 2012

physics
(a) a person in a wheelchair approaches a 0.50-m-high ramp with a speed of 3.5 m/sec. calculate the final speed of the wheelchair at the top of the ramp if the person coasts up and friction is negligible. (b) what initial speed would be necessary to be 1.0 m.sec? i need this ...
May 4, 2012

Spanish-Thank you
Thank you-I see where I made the mistake I think I got confused with the presentaste having the (te) on the end so I thought I didn't have to put the (te) in front of presentaste Thank you again
May 3, 2012

Spanish-Please check
I had to change these into the past tense preterite are they correct tú presentarse would it be tú presentaste él sentirse would it be él se sintió
May 3, 2012

algebra
h = 52y
May 3, 2012

math
your bike tire has a radius of 14 inches. If your tire makes 100 revolutions, how many feet does your bike travel?
April 25, 2012

math
Your bike tire has a radius of 14 inches. If you travel a distance of 56 feet on your bike, how many complete revolutions did your bike tire make?
April 25, 2012

Physics
Water has a density of 1000kg/m^3. The depth of a swimming pool at the deep end is about 4m. A)What is the volume of a column of water 4m deep and 1m^3 in cross-sectional area? B)What is the mass of this column of water? C)What is the weight of this column of water in newtons...
April 24, 2012

foreign language
Americans Despite its ethnic diversity, the United States has managed to absorb bits and pieces of many cultures and weave them into a unique culture that is strikingly consistent and distinct. You can pick out Americans anyplace in the world, often very quickly, because of ...
April 22, 2012

history
There is a general answer if you look from the doves perspective
April 16, 2012

history
According to the doves(people opposed to the Vietnam war) answer this question. Was the motive for US involvement in Vietnam primarily to help the average South Vietnamese citizen or was it primarily to gain a power advantage over Russia and China? That is, did US leaders care...
April 16, 2012

trig
An airplane is flying at an altitude of 31,000 feet when it begins its descent for landing.If the runway is 104 miles away,at what angle does the airplane descend?
April 15, 2012

trig
You measure the angle of elevation from the ground to the top of a building as 32 degrees.When you move 50 meters closer to the building,the angle of elevation is 53 degrees. How high is the building?
April 15, 2012

trig
A submersible traveling at a depth of 250 feet dives at an angle of 15 degrees with respect to a line parallel to the water's surface. It travels a horizontal distance of 1500 feet during the dive. What is the depth of the submersile after the dive?Explain how the angle of...
April 15, 2012

Phys
Some propane occupies 150 cm^3 at 12.4°C. Find the temperature when its volume is 132ft^3 if the pressure remains constant.
April 11, 2012

ETHICS
This pisses me off ---- this is only a 300 level class at the university of phoenix which you are paying 1300 to 1600 to take this class and you cant do your own essay.....seriously!
April 10, 2012

biology
thank you, i have seen that site. but it doesnt not explain the steps and process that the brain takes in order to make a person fall sleep
April 9, 2012

biology
What part of the brain controls sleep and how does it work. I am looking for a easy to understand answer because when i have searched i do not understand it.
April 9, 2012

english
is giving information(such as mentioning details about something that happened) considered part of ethos?
April 1, 2012

physics--please help
thank you soooo much...the answer is correct..thanks again for working on it for this long
April 1, 2012

physics--please help
yes they hit it at 256.7..i typed it wrong...i am still not getting the correct beat frequency
April 1, 2012

physics--please help
I am sorry..but this is not the right answer either
April 1, 2012

physics--please help
could you help me more with this?
April 1, 2012

physics--please help
You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear ...
April 1, 2012

physics--please help
You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear ...
April 1, 2012

physics
This doesn't give me the correct answer
March 31, 2012

physics
You are traveling in a car toward a hill at a speed of 40.8 mph. The car's horn emits sound waves of frequency 243 Hz, which move with a speed of 340 m/s.The frequency with which the waves strike the hill is 254.7Hz and the frequency of the reflected sound waves you hear ...
March 31, 2012

physics--please help
how do you find beat frequency?
March 30, 2012

Math
why does 1/(n(n+1)) converges?
March 28, 2012

physics
NEED HELP WITH ONLY PART C Two 135.1.0-W speakers, A and B, are separated by a distance D = 3.6 m. The speakers emit in-phase sound waves at a frequency f = 11800.0 Hz. Point P1 is located at x1= 4.50 m and y1 = 0 m; point P2 is located at x2 = 4.50 m and y2 = –y. a) ...
March 27, 2012

physics--please help
A half-open pipe is constructed to produce a fundamental frequency of 230 Hz when the air temperature is 17 °C. It is used in an overheated building when the temperature is 39 °C. Neglecting thermal expansion in the pipe, what frequency will be heard?
March 26, 2012

algebra
8-t/2=53
March 26, 2012

Physics-Thermo
Imagine a 600 g of water at 70oC in a piston-cylinder device. Initially, the 9-kg, 13-cm diameter piston rests on two stops such that the water occupies a volume of 0.2 m3. Heat is transferred to the system until the water is completely vaporized. Take the atmospheric pressure...
March 26, 2012

thermodynamics
A piston-cylinder device contains 100 g of ethylene gas initially at 27oC, 115 kPa. Ethylene is heated and the piston starts to rise until the volume reaches 90 L and merely touches a linear spring that has a spring constant of 60 kN/m. More heat is added until the piston ...
March 26, 2012

physics
no
March 24, 2012

physics
The grid in a high-vacuume triode is usually kept negatively charged with respect to the cathode so that the electrons may be
March 24, 2012

physics
this gives me the answer for drag force
March 24, 2012

physics
A ball of circumference 71.5 cm and mass 640 g is forced to the bottom of a swimming pool and then released. After initially accelerating upward, it rises at a constant velocity. (The density of water is 103 kg/m3.) (a) Calculate the buoyant force on the ball.
March 24, 2012

physics
A child loses his balloon, which rises slowly into the sky. If the balloon is 13 cm in diameter when the child loses it, what is its diameter at the following altitudes? Assume that the balloon is very flexible and so surface tension can be neglected. (a) 2200 m
March 23, 2012

physics
A mass M = 5 kg moves with an initial speed v = 3 on a level frictionless air track. The mass is initially a distance D = 0.250 m away from a spring with k = 844 N/m, which is mounted rigidly at one end of the air track. The mass compresses the spring a maximum distance d, ...
March 23, 2012

chemistry
are compressive strength and brittle the same thing..if not then what is the difference?
March 21, 2012

math
16stickers are placed in a box if one sticker Is drawn from the box which color is it most Likely to be? Key:-1 Red I I I Blue I I I I Yellow I I Green I I I I I I I
March 20, 2012

chemistry
the components in the following glycerolphospholipid are: O || CH2OC(CH2)14CH3 | O | || CHOC(CH2)14CH3 | O | || + CH2OPOCH2CH2NH3
March 20, 2012

chemistry
what is the difference between a nanocomposite and a nanotube?
March 19, 2012

chemistry
please give me an example of a nanocomposite material
March 16, 2012

chemistry 30a
What volume (in mL) of an 8% w/v acetic acid solution would be needed to form 2.2 L of carbon dioxide gas at 25.2 degrees Celsius and 0.9982 atm? Assume the acid is reacted with excess sodium bicarbonate, and round your final answer to two sig figs.
March 12, 2012

math 156Trig Help
2x
March 11, 2012

Physics
ions
March 7, 2012

physics
A box with a mass of 2 kg is lifted (without acceleration) through a height of 8.0 m in order to place it upon the shelf of a closet. (a) What is the increase in potential energy of the box? 1 . J (b) How much work was required to lift the box to this position? 2 J
March 5, 2012

Physics
A roller-coaster car with a mass of 650 kg starts at rest from a point 28 m above the ground. At point B, it is 14 m above the ground. [Express your answers in kilojoules (kJ).] (a) What is the initial potential energy of the car? 1 . kJ (b) What is the potential energy at ...
March 5, 2012

Algebra
in put y=x(10)
March 5, 2012

Math
The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7, 4). If the triangle is reflected over the line y = 3, what are the coordinates of the image of D? (3, –6) (3, –3) (3, 0) (3, 9)
February 28, 2012

Geometry
b.20 because 1:3:5 1+3+5=9 180/9=20 20:60:100
February 28, 2012

1 geometry question
The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7, 4). If the triangle is reflected over the line y = 3, what are the coordinates of the image of D? (3, –6) (3, –3) (3, 0) (3, 9) i have no clue
February 28, 2012

Finance
Which of the following has more interest risk? Why? A. Bond A with a 10% Coupon and a YTM of 10% which matures in 5 years. B. Bond B with a 10% Coupon and a YTM of 10% which matures in 11 years. C.) A share of Preferred Stock that pays $10 dividend in perpetuity with a ...
February 28, 2012

Finance
A proposed project has expected cash flows of $72,000 per year for 5 years. If the project has an initial cost of $400,000, what is the payback period (in years)?
February 28, 2012

Finance
You recently paid $31.50 for a share of Breaking Benjamin stock. Your required rate of return is 13% and you expect the company to increase dividends at a constant rate or 2.5% for the forseeable future. What was the most recent dividend of Breaking Benjamin?
February 28, 2012

calculus
A 29-ft chain with mass density 3 lb/ft is initially coiled on the ground. How much work is performed in lifting the chain so that it is fully extended (and one end touches the ground).
February 24, 2012

chemistry
How many molecules in 8.221g PbO2?
February 23, 2012

geometry
find the altitude of an equilateral triangle with side length twelve
February 23, 2012

geometry
the base of an isoscels triangle is 4x long. the altitude to the base is 3x cm long. Find the length of one other side of the triangle
February 23, 2012

physics--please help
When only the front wheels of an automobile are on a platform scale, the scale balances at 7.8 kN; when only the rear wheels are on the scale, it balances at 5.5 kN. What is the weight of the automobile? How far is its center of mass behind the front axle? (The distance ...
February 23, 2012

physics
When only the front wheels of an automobile are on a platform scale, the scale balances at 7.8 kN; when only the rear wheels are on the scale, it balances at 5.5 kN. What is the weight of the automobile? How far is its center of mass behind the front axle? The distance between...
February 22, 2012

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